Means for attaching cultivator-teeth



(Model) O. M. STEVENS.

Means for Attaching Cultivator Teeth.

No. 236,377. Patented J an. 4,1881.

VENTOR WITNESSES (Yam/r fifd z fiz wa W I wbmm if/(1 M M r ATTORNEYS N PETERS, PHOTO-IJTHOGRAPNER, WAHINGTON.

UNITED STATES PATENT @rrrca CLARK M. STEVENS, OF BERLIN, WISCONSIN.

MEANS FOR ATTACHING CULTlVATOR-TEETH.

SPECIFICATION forming part of Letters Patent No. 236,377, dated January 4, 1881.

Application filed October 23, 1880.

To all tvhom it may concern Be it known that I, CLARK M. STEVENS, of

Berlin, in the county of Green Lake and State of Wisconsin, have invented a new and valuable Improvement in Means for Attaching Cultivator-Teeth; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a side view of this invention. Fig. 2 is a plan view, and Fig. 3 is a detail.

This invention relates to the attachment of cultivator-teeth to the beam. It consists in the construction hereinafter specified.

In the annexed drawings, A is the beam, and B the tooth. The standard of this tooth has bolted to it a bracket-arm, G, and both are made fast to the beam by a pivot-bolt, D, and brace E. Upon the inner end of bolt D, next the beam, is placed a block or washer, I and between said block and the bracket-arm 0 there is placed loosely upon bolt D a ratchetwheel, H. In a recess, 2', in curved arm I of bracket-arm O is seated the'end of pawl K, whose edge engages ratchetwheel H, being held there by spring L. M is a latch.

In plowing the tooth is set at any desired angle, its pawl K resting in ratchet-wheel H. In ordinary plowing the friction of ratchetwheel H upon its pivot and against the bracketarm (J and block B will prevent the tooth from being forced back but when greater resistance comes, as when striking a stone or a root, this friction will be overcome, and the tooth (Mode1.)

will turn backward without the horses being checked or the tooth damaged. By liftingup 40 the end of the beam the tooth will fall to its proper position.

The latch M is intended for a stop, to prevent the shovel from going too far forward when it is being moved back to place after i 5 having been tripped by an obstruction.

I am aware that a cylindrical thimble-bearin g having a central opening in which an eyebolt for securing the standard of the tooth rests and is passed through the beam has been used in connection with a spring-pawl for bolding the tooth, except when it meets with an obstruction, as may be seen in Patent 86,794, of February 9, 1869; also, that a toothed wheel held by friction between the sides of a double beam has been used in combination with a chain connected to a seed-tube above and below the beam, as shown in Patent 97,903, of December 14, 1869; and I do not claim either of these constructions herein.

I claim- In a slip-tooth for cul-tivators, the combination, with the beam A, bracket-arm O, and brace E, of the pivot-bolt D, ratchet-wheel H, and pawl K, seated in the recess 2' of the bracket-arm, and held in place by the spring L, constructed and operating substantially as and for the purposes set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

CLARK M STEVENS. 

